feat(player): album-art thumbnails in web queue rows — #1944

Adds a 40px cover thumbnail (coverUrl(album_id), FALLBACK_COVER on error) to
each queue row, matching the artwork every comparable player shows in its
up-next list.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/lib/components/QueueTrackRow.svelte

@@ -3,6 +3,7 @@
   import { draggable, type DragEventData } from '@neodrag/svelte';
   import type { TrackRef } from '$lib/api/types';
   import { playFromQueueIndex, removeFromQueue, moveQueueItem } from '$lib/player/store.svelte';
+  import { coverUrl, FALLBACK_COVER } from '$lib/media/covers';
   import { offsetToDelta } from './queue-row-math';
   import LikeButton from './LikeButton.svelte';
 
@@ -66,6 +67,13 @@
     <GripVertical size={16} />
   </button>
 
+  <img
+    src={coverUrl(track.album_id)}
+    alt=""
+    onerror={(e) => ((e.currentTarget as HTMLImageElement).src = FALLBACK_COVER)}
+    class="h-10 w-10 flex-shrink-0 rounded object-cover"
+  />
+
   <button
     type="button"
     onclick={handleBodyClick}